net: add support for Redox OS (#5790)

Author: andrewdavidmackenzie

tokio/Cargo.toml

@@ -121,11 +121,11 @@ tracing = { version = "0.1.25", default-features = false, features = ["std"], op
 backtrace = { version = "0.3.58" }
 
 [target.'cfg(unix)'.dependencies]
-libc = { version = "0.2.42", optional = true }
+libc = { version = "0.2.145", optional = true }
 signal-hook-registry = { version = "1.1.1", optional = true }
 
 [target.'cfg(unix)'.dev-dependencies]
-libc = { version = "0.2.42" }
+libc = { version = "0.2.145" }
 nix = { version = "0.26", default-features = false, features = ["fs", "socket"] }
 
 [target.'cfg(windows)'.dependencies.windows-sys]

tokio/src/net/unix/ucred.rs

@@ -31,7 +31,12 @@ impl UCred {
     }
 }
 
-#[cfg(any(target_os = "linux", target_os = "android", target_os = "openbsd"))]
+#[cfg(any(
+    target_os = "linux",
+    target_os = "redox",
+    target_os = "android",
+    target_os = "openbsd"
+))]
 pub(crate) use self::impl_linux::get_peer_cred;
 
 #[cfg(any(target_os = "netbsd"))]
@@ -49,7 +54,12 @@ pub(crate) use self::impl_solaris::get_peer_cred;
 #[cfg(target_os = "aix")]
 pub(crate) use self::impl_aix::get_peer_cred;
 
-#[cfg(any(target_os = "linux", target_os = "android", target_os = "openbsd"))]
+#[cfg(any(
+    target_os = "linux",
+    target_os = "redox",
+    target_os = "android",
+    target_os = "openbsd"
+))]
 pub(crate) mod impl_linux {
     use crate::net::unix::{self, UnixStream};
 
@@ -58,7 +68,7 @@ pub(crate) mod impl_linux {
 
     #[cfg(target_os = "openbsd")]
     use libc::sockpeercred as ucred;
-    #[cfg(any(target_os = "linux", target_os = "android"))]
+    #[cfg(any(target_os = "linux", target_os = "redox", target_os = "android"))]
     use libc::ucred;
 
     pub(crate) fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {